Calendar



' March 19,1929. Q p JOHNSON 1,705,866 Q CALENDAR Filed April 4, 1925 2 Sheets-Sheet 1.

"Snow/1443M BR. Johnson/ Patented Mar. 19, 1929.

UETED STATES PETER R. JOHNSON, OF EXCELSIOR, MINNESOTA.

CALENDAR.

Application filed April .4,

This invention relates to rotary calendars.

The object of the invention is to furnish a calendar composed of two parts bearing cooperating indicia which are rotatable fiatwise on each other upon a common center. By rotating one part'upon the other a calendar for any month in a long series of years may be presented by the simple process of placing the month. and required year in the same sector and thereby obtaining thecalendar for the month-that is, the days of the week and the days of the month will fall into the same sectors with one another.

lVith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings Figure 1 represents a front elevationof a calendar constructed in accordance with this invention;

Fig. 2 is a transverse section thereof; Fig. 3- is a front elevation of a slightly different form of calendar; and Fig. 4 is a transverse section thereof;

The dial calendar 1 constituting this invention as shown in Figs. 1 and 2 is composed of two parts 10 and 20 arranged in tour concentric rows or circular rings about a con'nnon centercircle 2 to turn on a common center 2. An additional concentric row or circular ring 23 is added to indicate the daysin each month when that is deemed desirable. i

Thirty-five lines radiating from a common center divide the circular rings of member 20 into truncated sectors 22 and those of member 10 into sectors 10 In some or all of these rows or circular rings, some of the lines are omitted to simplify the diagram.

The items that appear upon the rows or circular rings of the two members 10 and 20 are arranged in two groups-the years and the days of the month appearing in the group on member '10 while the days of the week, the months of the year and the number of days in each month appear in the other group of member 20.

The items of one of these groups'is printed upon the card 10 and the items of the 1925. Serial No. 20,786.

second group upon the dial 20 which rotates flatwise upon the card. r

The order or the rows or circular rings may vary from that shown in the diagram, the essential thing being that the items of one group are fixed relatively to one another; and likewise in regard to the items of the other group. 7

The years appear in order in the truncated sectors 11 of one row or circular ring on card 10. The days of the monthand here 31 days are indicated, but those not needed for the shorter months may be covered if deemed necessaryappear in the truncated ectors 12 of the second circular ring or row of member 10. These two sets of items form one group, and must be printed on one part of the diagram, whether it'be the card 10 as shown in the diagram submitted, or on dial 20. Upon the truncated sectors 21 of a third.

circular ring on member 20 appear the days of the week, repeated as often as is necessary; upon the truncated sectors 22 of a fourth row or circular ring appear the months of the year, and upon the fifth circular ring 23 and adjacent to months is indicated the number of days in each month. which latter facts might be otherwise indicated.

A good arrangement of the parts is shown in Fig. l which shows the two circular rings containing the years and the days of the month printed upon the two circular rings upon the cardi 10 whereas the days of the week, the months of the year and the days in each month are printed upon the-dial 20, which is ailixed to card 10 to rotate about a common center.

The years appearing] upon 1 read from 1914-1941 inclusive inreguiar mrder,

the leap years being divided to occupy two truncated sectors, inevery case. Other years than those here appearing may of course be placedabout' the diagram. I 7

The circular form may also be replaced by other forms, and the items as t my appear upon these rings may be otherwise'arranged in any rearrangement of the parts of the calendar to make it readily read. Fig. 1 shows one good arrangement, but in printing the calendar theitems would of course be so arranged as to be readily read.

To use this calendar the disk or dial 20 is rotated until the required month and year are in the same sector, when the days of the week for any particular day of the month may be read by reading the day of the week in the same sector with day of the month. Simply rotating the dial or disk 20 to get month and year to come into the same sector presents the calendar for the month.

To ascertain upon what day of the week May 5, 1924 occurs, rotate dial 20 so May and 1924-Mar-Dec. come into same sector. It will then appear that May 5th is adjacent to Monday, and hence May 5, 1924 was on Monday. In a similar manner other dates may be located.

he items appearing upon card as well as the items appearing upon dial 20 may be rearranged to best suit the purpose of the calendar, it being however essential that these items be so arranged that when the month and year are brought into the same sector, that the calendar will give correct information. An entire new alinement mightbe desired.

As shown the outer disk or card 10 is mounted or printed so circular ring straddles and protects the perimeter of said disk and is provided with an apertured ear 16 designed for suspending the calendar and opposite which the current year may be arranged as shown in Fig. 1 of the drawings, the year 1924- being opposite said lugs. This lug may of course be dispensed with if it is desired to suspend calendar by means of a thumb tack or otherwise through center of calendar, which latter method is convenient when dial is mounted to rotate about a small paper circle affixed to card 10.

Some of the items shown in Fig. 1 will not require rearrangements with succeeding cal- .endars, and in fact none of them need be changed for many years ahead; but should other items than those appearing be preferred, they may be substituted but they must of course conform with the principle which governs the construction of the calendar. Facts such changes of the moon may be printed for convenience. This calendar permits the location of: the day or the week for any day in any month during a long period of years, by simply rotating dial so that month and year sector coincide, when day of the week will be adjacent to the days of the month.

The form shown in Figs. 3 and 4t is made rectangular and has five horizontal rows 24; for years which are radially divided into seven columns 26 pointing to a common center 27. At the diametrically opposite side of the diagram are located the days of the month (31 or less as required) also arranged in five horizontal rows 28 and also divided by radiating lines- 29 into seven columns 30 pointing to the common center.

The above described items are printed upon the card 10 with such other information as the order of the months and the days in each month shown at 31 and Upon a circular dial or dish appear the months of the year arranged in seven truncated sectors 33 corresponding with columns 26 for years shown 011 card 10*.

The days of the week are appropriately arranged upon trtuicated sectors 3% on the opposite margin of dial 2 and corresponding to the columns for the days of the month.

To secure calendar for month, simply rotate dial 20 so that month and year are in the same sector or column. The calendar will then appear below with the suitable day of the week at the top of respective columns of the days of the month.

In this form the years and days ot the month are grouped together instead of being scattered about the diagrai'n. In both forms shields or covers as 35 may be used over parts to present a minimum number of facts to theeye.

I claim 2- V In a calendar, a circular body por tion having a circular line disposed substantially centerly thereof and having lines radiating from the circular line, defining spaces to receive characters designating years, said body portion having spaced circular lines spaced from the outer edge of the body portion defining spaces to receive numbers designating the days of the month, a circular movable disc mounted on the body portion and having lines radiating from the center thereof defining spaces to receive indicating characters indicating the months of the year and days of the months and said movable.

disc ac'tapted to be moved to bring the indicating characters thereof 1nto cooperative relation with the indicating characters of the body portion to provide a changeable calendar.

In testlmony that I claim the foregoing as my own, I have hereto afiixed my signature.

P'ETER R. JOHNSON. 

